Air Outlet Temperature Sensor: Operation

WARNING: This page is about a different car, the 2004 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.

The air outlet temperature sensor monitors the temperature of the air coming out of the heater housing unit. The sensor will change its internal resistance in response to the temperatures it monitors. The ATC control module is connected to the sensor through a sensor ground circuit and a sensor signal circuit. As the air temperature increases, the resistance of the sensor decreases and the voltage monitored by the module decreases. The module uses this monitored voltage reading to an indication of the outlet air temperature. The ATC control module makes adjustments to maintain the requested interior temperature by cycling both the A/C compressor and solenoid heater valve on and off.

The air outlet temperature sensor is diagnosed by performing the ATC Function Test using the DRBIII(R) scan tool. Refer to BODY DIAGNOSTIC PROCEDURES .

The air outlet temperature sensor cannot be adjusted or repaired, and if faulty or damaged, it must be replaced.